Issue #3181042 by Grimreaper: getExposedFilterWidgetType method is not working properly

src/Plugin/better_exposed_filters/filter/FilterWidgetBase.php

@@ -325,6 +325,7 @@ abstract class FilterWidgetBase extends BetterExposedFiltersWidgetBase implement
     $form_state->set('exposed', TRUE);
     /** @var \Drupal\views\Plugin\views\filter\FilterPluginBase $filter */
     $filter = $this->handler;
+    $filter->buildExposedForm($form, $form_state);
     $filter_id = $filter->options['expose']['identifier'];
 
     return $form[$filter_id]['#type'] ?? $form[$filter_id]['value']['#type'] ?? '';